Welt-channeling attachment for sole-sewing machines.



C. J. CADY & J. E. THAYER. WELT UHANNELING ATTACHMENT FOR SOLE SEWINGMACHINES. APPLICATION FILED 'oo'r. 11, 1907.

Patented Feb. 13, 1912.

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CARSON J. CADY, 0F R-QCEESTER, NEW YQBK, MED JOSEPE E. THAYER, OF WESTBRIDGEWATEB, MASSACEUSETTS, ASEaIG-NORS T0 UNITED SHOE MACHINERY OM-PANY, 0F PATERSON, NEW JERSEY, A CQBPQRATION OENEW JERSEY.

VTELT-CHANNEL'ZEG ATTACHMEB FT FOR SGLE-SEWING MACH INES.

States of New York and Massachusetts,-

have invented certain new and useful Improvements in Vv elbChannehngAttach ments for Sole-Sewing Machines; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the some.

The present invention relates to welt channeling attachments for solesewing ma chines and particularly to that class of welt channelingattachments which comprise a knife movable into and out of operativeposition, mounted independently of the work table of the machine, andarranged to extend upwardly through the work support in position to cuta stitch-receiving groove or slit in the upper surface of the we t inadvance of the needle, so that thestitches, which cure the outsole andwelt, can be sunk below the upper surface of the well: at the forepartor the shoe, andthe subsequent operation of forming ornamentalindentations on the welt can be performed-by an ordinary indentingwheel, without liability of injuring the stitches; of the seam.

The objects of the present invention are to provide a welt channelingattachment of the class above referred to, in which the channeling knifeis so shaped as to be stronger and more rigid than knives which haveheretofore beenused, and in which the channeling knife can be heldfirmly against the thrust of the work without ending an abutmentonthe-work support, so that the attachn'ient can be used with the ordinaryform of work support provided with an owl and needle slot, and thenecessity cutting away the work supportto form an abutment or ofproviding a special. form of work support is avoided,

in one form of welt channeling attachent which has hereto. ere beendevised, the welt channeling knife is formed upon the upper end of anarm composed of a flat piece metal," being mounted below the worksupport upon is pivot, the lower end of Specification of Letters Patent.

Application filed October 11, 1887.

' rseeneearen. regrets,

Serial No. 398,886.

the arm extending in the direction of feed, and the upper end of the armextending through the awl and needle slot of the work support To holdthe welt channe "ii'ng knife in position against the thrustofthe work,it necessary, with this form of knife-carrymg arm, to cut away a portionot the work support to form an abutment for the upper end of the arm.

In accordance with a feature of the present invention, a knife-carryingarm composed of a piece of fiat metal is provided, and this arm twisted,a short distance above its lower end, through anengle of 90, so that themetal in the upper portion of the arm is disposed in the best manner toresistthe thrust of the work, and this portion of the arm is renderedsuflicient-ly stiff and rigid to maintain the welt channelingknife inposition. I

Another feature of the present invention contemplates the provision, ina welt channeling attachmentprovided with 'a knife carrying armsupported independently of I the work support, of a brace arranged toengage the arm above its pivot and support the arm againstthe thrust ofthe work.

This feature of the invention may be used with any suitable form ofknife-carrying arm, but is particularly adapted for use with theknife-carrying arm above referred to aswonstituting a feature of thepresent invention, since the upper portion of this arm is of suilicientrigidity to withstand the thrust of the work, and by the provision of abrace engae'ing the arm above its pivot, the lower portion of the arm issupported, and the arm can be used without the necessity of providingany abutment on the work support for the upper end of the arm. In itsbroader aspectsthis feature of the present invention contemplates theuse of any suitable form of brace. In the preferred form of theinvention, howeiver, the brace is pivotally mounted. concentrically withthe knife carryin arm and is adapted to swing with the arm.

In addition to the features above referred to the present invention alsoconsists in certain con ructions and arrangements of parts hereinafterdescribed and claimed the advantages of which will be obvious to thoseskilled in the art from the following do script-ion.

ill

The present invention will be clearly understood from the accompanyingdrawing, in which-- I Figure 1 is a view in front elevation of thepreferred form of the attachment together with so much of a sole sewingma chine as is necessary .to show the connection of the attachmenttherewith. Fig. 2 is a view in side elevation of the edge gage slide ofthe sewing machine with the welt channeling knife mounted thereon, theknife arm beingshown as extending upwardly through the awl and needleslot of the work support, which is shown in section, and the parts beingin the position which they assume when the channeling knife is in aposition to cut a channel in the welt. Fig. 3 is a detail sectional viewtaken on the line 50-02 of Fig. 2. i Fig. 4 is a detail view of theadjustable eccentric sleeve upon which the knife carrying arm is mountedand by which it isadjusted vertically, and Figs. 5 and 6 are detailviews in rear and side clevation respectively of the knife carrying Inthe drawing 1 indicates the curved hook needle? the work support ortable, 3 the edge gage and (it the edge gage slide of sole sewingmachine, such for instance as is disclosed in the patent to French andMeyer, No. 473,870, dated April 26, 1892. The slide 4 is mounted to movetransversely to the direct-ion of feed upon a fixed guide 5, and isactuated at the desired times by the operator from the feed changinglever 6, said lever being connected by a link to an arm 7, secured tothe lower end of a rock shaft 8, mounted in. a stationary block 9, whichshaft is provided at its upper end with a slotted arm which engages apin 7 l1 projecting downwardly from the slide 4-.

The construction, arrangement and mode of operation of the edge gageslide and the mechanism by which it is operated are well known to those"skilled in the art and need a not be more specifically describedherein.

of the edge gage slide 4 by means of a bolt i l. The upper end of theknife carrying arm is provided with a welt slitting knife 15 of usualform and projects through the awl and needle slot of the work support 1in position to cut a channel in the upper surface of the welt in advanceof the needle. The welt channeling knife 15 is moved into and out ofoperative position in the usual man" ner by moving the edge gage slidet, the knife. being projected when the edge gage slide is moved. forwardand being retracted when the edge gage slide moved to the toriya eorear. To enable the knife to be projected and retracted in this mannerit is necessary that the p1vot for the lower end of the knife carryingarm extend in the' direction of feedas will be obvious from aninspection of F igs. 1 and 2. To enable the knife carrying arm to be sopivoted and at the same time to give the arm the greatest possiblestrength and rigidity, the arm is twisted through an angle of 90 a shortdistance above its lower end, so that the greatest width of the up perend of the arm extends in the direction of feed. The twisting of the armcauses its upper end to be of suiiicient rigidity to support thechanneling knife against the thrust of the work so that the upper end ofthe arm can extend loosely through the and and needle slot of the worksupport and no sup porting abutment for the upper end of the arm isrequired. To prevent the arm fromv yielding at its lower end when. thework is forced against the welt channeling knife, a brace 16 1Sprovlded, which brace consists of an arm pivotally mounted upon the bolt14: outside of the sleeve 13 and having its up per end arrtlnged toengage the arm 12 above the point at'which is twisted. To cause thebrace to swing "with the knife carrying arm and to prevent its beingaccidentally disengaged therefrom, the upper end of the brace isprovided vwith lugs extending on each side of the arm.

1.'A sole sewing machine, having, in combination with the stitch formingdevices, a work support, an arm pivotally mounted below the work supportupon an axis extending in the direction of feed and having its upperfree endv engaging the awl and needle slot of the work support, said armconsisting of a flat piece of metal having its lower end port-ionarranged at right angles tothe upper portion, a Welt channeling knifeupon the upper end of the arm, and a movable support for the lower endof the arm.

2. A sole sewing machine, having, in combination with the stitch formingdevices, a work support, an arm pivotally mounted be low the worksupport and having its upper free end engaging the awl and needle slotof the work support, a Welt channeling knife upon the upper end of thearm and a brace specifically described, what is claimed is engaging thearm above its pivot and acting to support the arm against the'thrust ofthe work.

3. A sole sewing machine, having, in combination with the stitch formingdevices, a work support, an arm pivot-ally mounted be- 7 low the worksupportand having its upper free end engaging the 'awl and needle slotof the work support, said arm consisting of a flat piece of metaltwisted through anangle of 90 near its lower end, a welt channelingknife upon the upper end of the arm, and a brace engaging the arm abovethe point at which'it is twisted.

1 4. A sole sewing machine, having, in combination with the stitchforming devices, a work support, an arm pivotally mounted be low thework support and having its upper free end engaging the awl and needleslot of the work support, a welt channeling knife upon the upper end ofthe'arm, and a brace pivotally mounted to move with the arm engaging thearm above its pivot.

5. A sole sewing machine, having, in com-' bination with the stitchforming devices, a

'ing witnesses.

work support, an arm pivotally'mounted below the work support and havingits upper free end engaging the awl and needle slot of the work support,a welt channeling knife upon the upper end of the arm, a pivotallymounted brace engaging the arm above its pivot, and a bolt passingthrough andsupporting the arm and brace.

In testimonywvhereof I, the said CARBON J. CADY, have signed my name tothis specification in the presence of two subscribing Witnesses':'FREDERIOKL. EDMANDB, HARRY C.

. JosEPH E;

